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Service bulletins for the 2018 GMC Terrain

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1345 on file from NHTSA, as of 2026-10-19.

By type

By component

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Only bulletins with component: Cooling system are shown. Show all

Bulletins, newest first
PIP5684B2020-08-10. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:COOLING SYSTEM; EQUIPMENT. This Preliminary information communicates the use of air leak diagnostic test tool CH-52250 in addition to the information found in the service manual.
19NA0982020-03-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY; EQUIPMENT. This technical bulletin provides a procedure to add flocking to tape the radiator mount sleeves to reduce the knocking noise caused by the excessive movement.
19NA1042019-07-29. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. This informational bulletin provides information for dealers/technicians and customers on steam/vapor coming from the front grille or radiator area.
PIT5678A2019-07-08. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. This Preliminary information communicates an issue with the radiator lower mount that sounds as if it is coming from behind the front wheels.
19NA0982019-07-01. Service bulletin. STRUCTURE; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. This technical bulletin provides a procedure to add flocking tape the radiator mount sleeves to reduce the knocking noise caused by the excessive movement.
PIT5578A2019-04-08. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS; ENGINE AND ENGINE COOLING:COOLING SYSTEM:RADIATOR ASSEMBLY. This Preliminary information communicates the need to replace the heater hose clamps anytime the heater hoses are serviced.
PIE0452A2018-05-21. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of Charge Air Cooler Ice Blockage with Malfunction Indicator Lamp Illuminated and DTC P0299 Set After Completing Bulletin 18-NA-020
PIP5511A2018-02-21. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This Preliminary information communicates the potential for a flashing MIL and DTC p0300 to occur in areas of high amounts of rain fall or humidity. This is due to the moisture that can accumulate in the charge air cooler from the rapid cooling of the internal air and be ingested into the engine.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.